微信后台------请求流程3-微信服务器xml转换

约定不等于承诺〃 2022-02-23 12:06 270阅读 0赞

1.通过注解适配请求String

@RequestBody String requestBody

//收到微信服务器的http:xml请求
     WxMpXmlMessage inMessage = WxMpXmlMessage.fromXml(requestBody); 
     //返回微信服务器的http:xml响应
     WxMpXmlOutMessage outMessage = this.route(inMessage);

**XStream在toXML的时候对于Null值不进行标签输出**

2.将请求由String-->Xml：使用 XStream

2.1 java转换xml

public void testXml(){
    		
    		City city = new City();
    		city.setName("北京");
    		city.setDescription("中国首都");
    		
    		XStream xstream = new XStream();
    		xstream.alias("city", City.class);//若不写这句，根标签是City的全路径名
    		String xml = xstream.toXML(city);
    		System.out.println(xml);
    	}

2.2  List集合转化为XML

@Test
    	public void test2(){
    		City city = new City("天津", "直辖市");
    		City city2 = new City("重庆", "也是直辖市");
    		
    		List<City> cityList = new ArrayList<City>();
    		cityList.add(city);
    		cityList.add(city2);
    		
    		XStream xstream2 = new XStream();
    		xstream2.alias("直辖市", City.class);  //设置一个JavaBean的根标签
    		xstream2.alias("cities", List.class);  // 设置整体集合的根标签，若不写，根标签变为<list>
    		String c = xstream2.toXML(cityList);
    		
    		System.out.println(c);
    	}

<cities>
      <直辖市>
        <name>天津</name>
        <description>直辖市</description>
      </直辖市>
      <直辖市>
        <name>重庆</name>
        <description>也是直辖市</description>
      </直辖市>
    </cities>

2.3 XML转换为java

@Test  //将一个xml文件中的数据读取出来，并形成集合，集合中放的是city对象
    	public void test3() throws Exception{
    		
    		XStream xstream = new XStream();
    		//起别名
    		xstream.alias("city", City.class);
    		xstream.alias("cities", List.class);
    		
    		List<City> list = (List<City>) xstream.fromXML(new FileInputStream("src/cities.xml"));
    	
    		for (City city : list) {
    			System.out.println(city.getName()+","+city.getDescription());
    		}
    	}

2.4 使用注解配置映射关系

//在类上添加 @XStreamAlias("city")
    //在属性上添加@XStreamAsAttribute
    //如果再属性上添加 @XStreamOmitField 注解，则该属性将不会解析为 xml 中的属性
    
    @XStreamAlias("city")
    public class City {
    	@XStreamAsAttribute
    	private String name;
    	
    	@XStreamAsAttribute
    	private String description;
    	//封装……
    	
    	public City() {
    		
    	}
    	public City(String name, String description) {
    		super();
    		this.name = name;
    		this.description = description;
    	}
    	@Override
    	public String toString() {
    		return "City [name=" + name + ", description=" + description + "]";
    	}
    }

@Test  //引入注解
    	public void test4() throws Exception{
    		City city1_1 = new City("长沙","娱乐之都");
    		City city1_2 = new City("韶山","伟人故居");
     
    		City city2_1 = new City("石家庄","河北省会");
    		City city2_2 = new City("承德","避暑山庄");
     
    		List<City> cities1 = new ArrayList<City>();
    		cities1.add(city1_1);
    		cities1.add(city1_2);
     
    		List<City> cities2 = new ArrayList<City>();
    		cities2.add(city2_1);
    		cities2.add(city2_2);
    		
    		
    		XStream xstream = new XStream();
    		//引入一行代码，进行注解的检测
    		xstream.autodetectAnnotations(true);
    		System.out.println(xstream.toXML(cities1));
    		System.out.println(xstream.toXML(cities2));
    		
    	}
    }